HackingHealthcareHealthcareStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDFinancial accountPIIMediumContained

Advanced Care Hospital of Montana

bd_b08562056202142d · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 13, 2019

Filed

Apr 15, 2019

To disclose

5 weeks

Affected

180state residents only

Confidence

66%

Full breach record for Advanced Care Hospital of Montana →4 incidents on file

Advanced Care Hospital of Montana notified Montana residents of unauthorized access to employee email accounts in October 2018, discovered March 13, 2019. Compromised data included names, DOBs, SSNs, bank account info, and driver's license numbers. The hospital hired forensic investigators and offered one year of Experian IdentityWorks.

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Incident timeline

undetected · 163 days

discovery → filing · 5 weeks / 33 days

Oct 1, 2018

Begins

Mar 13, 2019

Discovered

Apr 15, 2019

Filed

vs. sector median

6 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed180 affectedView incident

Name: Advanced Care Hospital of Montana
norm: advanced care hospital of montana

Name: Advanced Care Hospital of Montana
norm: advanced care hospital of montana
Industry: Healthcarellm

Discovered: Mar 13, 2019
Breach occurred: Oct 1, 2018
Undetected for: 163 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 180state-resident count only
Data types: Identity (basic)Government IDFinancial accountPII
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Hired a leading third-party forensic firm to investigate potential unauthorized access
Offering a complimentary one-year membership of Experian IdentityWorks Credit 3B
Emphasizing email security through staff education
Reviewing email security procedures
Changes made: Emphasizing email security through staff education
Reviewing email security procedures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(33 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://dojmt.gov/wp-content/uploads/OCP/CON-2019.04.15-MT-AG-Notice-ACHMT-1.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 15, 2019
Raw hash: 264f6d4c3148246212a7b5863d13d92d1d56fd8d51808cf2b459204829b4a0fa

Reporting entityAdvanced Care Hospital of Montana

Victim entityAdvanced Care Hospital of Montana

Incidentdiscovered Mar 13, 2019

Stated responseHired a leading third-party forensic firm to investigate potential unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov